Real Dictionary

Icarus in American English
the son of Daedalus; escaping from Crete by flying with wings made by Daedalus, Icarus flies so high that the sun's heat melts the wax by which his wings are fastened, and he falls to his death in the sea
noun: a youth who attempted to escape from Crete with wings of wax and feathers but flew so high that his wings melted from the heat of the sun, and he plunged to his death in the sea

Icarus in British English
noun: the son of Daedalus, with whom he escaped from Crete, flying with wings made of wax and feathers. Heedless of his father's warning he flew too near the sun, causing the wax to melt, and fell into the Aegean and drowned